Being an old American, I've never grasped the whole metric thing. I'm trying to source parts but need to know some basic stuff. My Majesty has a bore and stroke of 83mm and 73mm, which somehow is supposed to translate to about 400cc+/-. If I increase the bore to 84mm, what do I end up with? What about 83.5mm? This part one of a two part problem. more to follow.....

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Walk fast...look worried."If you can make a girl laugh, you can make her do anything" Marilyn MonroeGoldwing Aspencade GL1500Burgman Executive 650Majesty 400 x2Morphous 250

Thank you! That simple formula is what I forgot. I guess I had another "senior moment". The reason I needed to know is I'm hoping to sleeve a Majesty engine bore to come up with a displacement of around 275cc+/- for a project I'm considering. The second question was solved, now that you helped clear out the cobwebs.